Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Net Revenue	$ 15,407,248	$ 16,672,416	$ 45,812,475	$ 46,534,358
Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	15,241,000	16,604,000	45,495,000	46,329,000
Drug Products
Disaggregation of Revenue [Line Items]
Net Revenue	166,000		317,000
Product Sales | Drug Revenue
Disaggregation of Revenue [Line Items]
Net Revenue	98,000		112,000
Product Sales | Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	14,746,000	16,099,000	44,010,000	44,815,000
Product License Agreements | Drug Revenue
Disaggregation of Revenue [Line Items]
Net Revenue	68,000	68,000	205,000	205,000
Product License Agreements | Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	495,000	505,000	1,485,000	1,514,000
United States
Disaggregation of Revenue [Line Items]
Net Revenue	13,946,000	13,713,000	40,697,000	40,050,000
United States | Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	13,848,000	13,713,000	40,585,000	40,050,000
United States | Drug Products
Disaggregation of Revenue [Line Items]
Net Revenue	98,000		112,000
United States | Product Sales | Drug Revenue
Disaggregation of Revenue [Line Items]
Net Revenue	98,000		112,000
United States | Product Sales | Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	13,353,000	13,208,000	39,100,000	38,536,000
United States | Product License Agreements | Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	495,000	505,000	1,485,000	1,514,000
Rest of World
Disaggregation of Revenue [Line Items]
Net Revenue	1,461,000	2,959,000	5,115,000	6,484,000
Rest of World | Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	1,393,000	2,891,000	4,910,000	6,279,000
Rest of World | Drug Products
Disaggregation of Revenue [Line Items]
Net Revenue	68,000		205,000
Rest of World | Product Sales | Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	1,393,000	2,891,000	4,910,000	6,279,000
Rest of World | Product License Agreements | Drug Revenue
Disaggregation of Revenue [Line Items]
Net Revenue	$ 68,000	$ 68,000	$ 205,000	$ 205,000